Corrosion Resistant Hafnium Particles

Shaanxi Zhongheng Weichuang Metal Materials Co., Ltd. supplies high-quality rare metals, mainly including niobium hafnium alloy 103, tungsten, tantalum, niobium, hafnium, titanium, zirconium, nickel, vanadium and alloys of conventional processed profiles such as plates, strips, coils, rods, wires, pipes, as well as deep processed products such as ships, crucibles, sputtering targets, coating targets, machined parts, high-temperature furnace insulation screens, heating elements, furnace bodies (heating furnaces, annealing furnaces), corrosion-resistant equipment, etc.

As a manufacturer, supplier, and exporter of hafnium materials, Shaanxi Zhongheng Weichuang Metal Materials Co., Ltd. provides high-purity, high-temperature resistant, corrosion-resistant, aerospace, defense, military, and marine engineering specialized products with worry free quality and more favorable prices! Customer service is always online, so you have no worries.

 

Corrosion resistant hafnium particles must meet the following core characteristics, which directly determine their reliability and application value in extreme environments:
1, Ultimate corrosion resistance

• Characteristic requirements: It must have excellent resistance to strong acids such as nitric acid, hydrochloric acid, sulfuric acid, and high-temperature liquid metals (such as sodium, lead bismuth), with an annual corrosion rate of less than 0.01 mm.
• Reason: Chemical and nuclear equipment are exposed to concentrated acids or corrosive media for a long time. If the material corrodes too quickly, it can cause equipment perforation, medium leakage, and even safety accidents. The dense oxide film of hafnium (HfO ₂) has extremely high chemical stability and is the fundamental guarantee of corrosion resistance.

2, High purity and low impurity content

• Characteristic requirements: Hafnium content ≥ 99.9%, and strict restrictions on impurities such as iron (Fe), nickel (Ni), chlorine (Cl) (single<50 ppm).
• Reason: Impurities can form galvanic cells and accelerate local corrosion, especially chloride ions may cause stress corrosion cracking. High purity ensures that the material remains uniformly passivated in corrosive environments, avoiding pitting or intergranular corrosion.

3, High temperature stability

• Characteristic requirement: Maintain structural stability in a high-temperature acidic environment of 200-600 ° C, without phase transformation or grain coarsening.
• Reason: Chemical reactors and nuclear fuel reprocessing equipment are often in high-temperature and high-pressure environments, and materials need to withstand both thermal stress and chemical corrosion, otherwise it will lead to performance degradation or failure.

4, Adjustable physical form

• Characteristic requirements: The particle size range should cover 1-150 μ m and can provide different morphologies such as irregular shape (high specific surface area) or spherical shape (high fluidity).
• Reason: Different application scenarios require matching different particle shapes - thermal spray coatings require irregular particles to enhance adhesion, while filled composite materials require spherical particles to improve fluidity and density.

5, Excellent sintering performance and coating adhesion

• Characteristic requirements: The particles should have good sintering activity and be able to form a high bonding strength coating with the substrate (such as steel, nickel alloy).

Reason: Hafnium particles are often used to prepare anti-corrosion coatings through thermal spraying. Poor sintering or insufficient adhesion can cause the coating to peel off and lose its protective function.

The specifications of corrosion-resistant hafnium particles cover a wide range: particle size ranges from 1-150 microns, fine powder (1-45 μ m) is suitable for coating and sintering, and coarse powder (45-150 μ m) is used for filling and composite; The morphology can be irregular (high specific surface area) or spherical (high fluidity); The oxygen content can be controlled below 800ppm (conventional grade) or below 300ppm (high-end application grade). All products meet the performance requirements of international standards such as ASTM G48 for corrosion-resistant materials.
 

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